//
//  UIWindowExtension.swift
//  ExtremeHealth
//
//  Created by Zhongkai Li 李忠凯 on 2018/9/18.
//  Copyright © 2018 GanDongKeJi. All rights reserved.
//

import UIKit

extension UIWindow {
    static var key: UIWindow {
        return ((UIApplication.shared.delegate as? AppDelegate)?.window)!
    }
}
